Outbound UDP means every single QSO added in Log4OM is sent to an external UDP socket, and I can receive it ? Is there any example ?
If I change or delete a QSO in Log4OM, do I also get a UDP packet so that I can see what was changed/deleted ?
Or, as a general question, what is the best way to synchronize Log4OM database content with external program ? I know there are MySQL sync tools, would it be the best way to use MySQL and just sync the Log4OM datbase (master) with external MySQL database (client) ?

BTW, I start Log4OM as Administrator (Win 8.1) i see "Log4OM communicator is active" and also some entries in activiry log, but all Communicator settings, inbound or outbound, are grey and I can not change or configure the options.

Same question for Inbound, how can I add QSO with UDP packet, is there an example ?

for inbound udp I found the info hereviewtopic.php?t=2340#p13697
so to add a QSO into Log4OM (from a custom self-made application) I have to send a packet starting with ADD and then the ADIF record.
I only found this info in forum, not in doc (PDF-File coming with Log4OM).

And as far as I understood Log4OM, an outbound UDP connection to add a QSO entered in Log4OM to an external (custom) program is not possible. There are some predefined, fixed interfaces to Clublog etc., but no general purpose interface (using UDP). So to sync Log4OM data with other than the predefined external programs, maybe a sync of SQLite or MySQL database can be used.

Yes thank you , of course after stopping communicator watching ADIF file for import is possible, but only for one file. But it's no problem to rename all external files to one common name/path.

Yes I'll have to read all doc and related forum posts and also YouTube videos. Log4OM is a great software, I'll try to migrate from Swisslog and also sync with my own Log/Cluster analyzing software, step after step.